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arav agrawal from kaanger valley academy, Raipur
Subject :NSO    Class : Class 8

Which of the following optical device(s) uses a lens to form a real image of an object?
(1) Magnifying glass
(2) Pinhole camera
(3) Slide projector

A(3) only
B(1) and (2) only
C(1) and (3) only
D(2) and (3) only.


Ans 1:

Lakshya Ajay Kawade from Holy Cross Kapa , Raipur
Class : Class 8
It should option C

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